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Multiplying and Dividing Rationals  Problem 5
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
Although you technically don't have to reduce fractions before you multiply them, reducing first makes the numbers you'll be working with smaller. If you don't reduce at the beginning, you'll have to do it at the end, anyway. Here, we practice reducing monomial rational expressions first by crossing out any factors that are the same in top and bottom of a fraction first, and then multiplying.
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
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Sample Problems (10)
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Multiplying and Dividing Rationals
Problem 1 6,133 viewsMultiply and simplify your answer.
3xy² ⋅ 4x³z 10y³ x³z³ 
Multiplying and Dividing Rationals
Problem 2 4,653 viewsMultiply and simplify your answer.
x + 3 (5x² + 10x) 5x² 
Multiplying and Dividing Rationals
Problem 3 4,422 viewsMultiply and simplify your answer.
m² + 5m + 6 ⋅ m² − 2m − 3 m − 3 m² + 3m + 2 
Multiplying and Dividing Rationals
Problem 4 4,074 viewsDivide and simplify your answer.
5t² + 10t − 15 ÷ 2t² + 7t + 3 5 − 6t + t² 4t² − 8t − 5 
Multiplying and Dividing Rationals
Problem 5 621 views 
Multiplying and Dividing Rationals
Problem 7 694 views 
Multiplying and Dividing Rationals
Problem 8 605 views 
Multiplying and Dividing Rationals
Problem 9 596 views 
Multiplying and Dividing Rationals
Problem 10 617 views 
Multiplying and Dividing Rationals
Problem 11 569 views
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